Landmark analysis looking at the actuarial probability of disease progression (death during treatment, progression to accelerated or blast phase of chronic myeloid leukemia [CML], loss of complete hematologic or major cytogenetic response or increase in white blood cells [WBC]) according to the level of cytogenetic and molecular response after 12 months of imatinib (P < .001; log-rank test).

Abbreviations: CCyR, complete cytogenetic response